#pragma once

#include <iostream>
#include <string>
#include <time.h>
#include <stdarg.h>
#include <cstring>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define SIZE 1024

#define Info 0
#define Debug 1
#define Waring 2
#define Error 3
#define Fatal 4

#define Screen 1
#define Onefile 2
#define Classfile 3

#define LogFile "log.txt"

class Log
{
public:
    Log()
    {
        printMethod=Screen;
        path="./log/";
    }

    void Enable(int method)
    {
        printMethod = method;
    }

    std::string levelTostring(int level)
    {
        switch(level)
        {
            case Info:
                return "Info";
            case Debug:
                return "Debug";
            case Waring:
                return "Waring";
            case Error:
                return "Error";
            case Fatal:
                return "Fatal";
            default:
                return "None";
        };
    }

    // void logmessage(int level,const char* format,...)
    // {
    //     time_t t = time(nullptr);
    //     struct tm* ctime = localtime(&t);
    //     char leftbuffer[SIZE]; 
    //     snprintf(leftbuffer,sizeof(leftbuffer),"[%s][%d-%d-%d %d:%d:%d]",
    //     levelTostring(level).c_str(),ctime->tm_year + 1900,ctime->tm_mon +1,
    //     ctime->tm_mday,ctime->tm_hour,ctime->tm_min,ctime->tm_sec);

    //     char rightbuffer[SIZE]; 
    //     va_list s;
    //     va_start(s,format);
    //     vsnprintf(rightbuffer,sizeof(rightbuffer),format,s);
    //     va_end(s);
    //     //格式：默认部分+自定义部分
    //     char logtxt[SIZE*2];
    //     snprintf(logtxt,sizeof(logtxt),"%s %s\n",leftbuffer,rightbuffer);
    //     //printf("%s",logtxt);    //临时打印检测
    //     printLog(level,logtxt);
    // }

    void printLog(int level,const std::string& logtxt)
    {
        switch(printMethod)
        {
            case Screen:
                std::cout << logtxt <<std::endl;
                break;
            case Onefile:
                printOneFile(LogFile,logtxt);
                break;
            case Classfile:
                printClassFile(level,logtxt);
                break;
            default:
                break;
        }
    }

    void printOneFile(const std::string& logname,const std::string& logtxt)
    {
        std::string _logname = path +logname;
        int fd = open(_logname.c_str(),O_WRONLY | O_CREAT | O_APPEND,0666);  //log.txt
        if(fd < 0)  return;
        write(fd,logtxt.c_str(),logtxt.size());
        close(fd);
    }

    void printClassFile(int level,const std::string& logtxt)
    {
        std::string filename = LogFile;
        filename +='.';
        filename += levelTostring(level);   //log.txt.Info/Debug/...
        printOneFile(filename,logtxt);
    }

    void operator()(int level,const char* format,...)
    {
        time_t t = time(nullptr);
        struct tm* ctime = localtime(&t);
        char leftbuffer[SIZE]; 
        snprintf(leftbuffer,sizeof(leftbuffer),"[%s][%d-%d-%d %d:%d:%d]",
        levelTostring(level).c_str(),ctime->tm_year + 1900,ctime->tm_mon +1,
        ctime->tm_mday,ctime->tm_hour,ctime->tm_min,ctime->tm_sec);

        char rightbuffer[SIZE]; 
        va_list s;
        va_start(s,format);
        vsnprintf(rightbuffer,sizeof(rightbuffer),format,s);
        va_end(s);
        //格式：默认部分+自定义部分
        char logtxt[SIZE*2];
        snprintf(logtxt,sizeof(logtxt),"%s %s\n",leftbuffer,rightbuffer);
        //printf("%s",logtxt);    //临时打印检测
        printLog(level,logtxt);
    }

    ~Log()
    {}
private:
    int printMethod;
    std::string path;
};